package com.itheima.jobs;

import com.itheima.constant.RedisConstant;
import com.itheima.utils.QiniuUtils;
import org.springframework.beans.factory.annotation.Autowired;
import redis.clients.jedis.JedisPool;

import java.util.Set;

/**
 * 自定义定时任务，定期清理垃圾图片
 */
public class ClearImgJob {

    @Autowired
    private JedisPool jedisPool;

    public void clearImg(){
        //根据Redis中保存的两个set集合进行差值计算，获取垃圾图片名称
        Set<String> set = jedisPool.getResource().sdiff(RedisConstant.SETMEAL_PIC_RESOURCES, RedisConstant.SETMEAL_PIC_DB_RESOURCES);

        if(set != null && set.size() > 0){
            for (String picName : set) {
                //清理垃圾图片，删除云存储上的图片
                QiniuUtils.deleteFileFromQiniu(picName);

                //从redis集合中删除图片名称
                jedisPool.getResource().srem(RedisConstant.SETMEAL_PIC_RESOURCES, picName);
            }
            System.out.println("清理垃圾图片成功");
        }
    }

}
